California counties ranked by the lowest enrollment-weighted state-assessment proficiency. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 37.5%. Showing ranks 51 to 55.
| # | County | State | % Proficient |
|---|---|---|---|
| 51 | Orange County | CA | 54.3% |
| 52 | Placer County | CA | 55.9% |
| 53 | San Mateo County | CA | 56.0% |
| 54 | Marin County | CA | 57.0% |
| 55 | Santa Clara County | CA | 57.6% |